public class A
{
  public static int X;
  internal static int Y;
  private static int Z;
}
internal class B
{
  public static int X;
  internal static int Y;
  private static int Z;
  public class C
  {
    public static int X;
    internal static int Y;
    private static int Z;
  }
  private class D
  {
    public static int X;
    internal static int Y;
    private static int Z;
  }
}
